Bending-machine



(No Model.) M. MGMASTER BENDING MACHINE. A

Patentedsept. 26,. 1893.;

NiTsn STATES PATENT OFFICE.

MERRITT MCMASTER, OFBATAVIA, ILLINOIS.

BENDINc-MACHINE.

SPECIFICATION forming part of Letters Patent No. 505,475, dated September 26, 1893. Application led April 12, 1893I Serial No. 470.017. (No model.)

To a/ZZ whom t may concern,.-

Be it known that I, MERRITT MCMASTER, a

`citizen of the United States, residing at Batavia, in the county of Kane and State of Illinois, have invented certain new and useful `Improvements in Bending-Machines, of which the following is a full, clear, and exact description, that will enable others to make and use the same, reference heilig had to the accompanying drawings, forming a part of this specification.

This invention relates more especially to a hand bending-machine for forming the headend of eye-bolts, and has for its object to provide a simple and convenient device of this character,whereby the work may be performed with facility.

In the drawings-Figure l is a plan of a machine embodying my improved features; Fig. 2, a part elevation and part section on line 2, Fig. 1, looking in the direction indicated by the arrow; Fig. 3, a broken-away side elevation; the anvil being shown in section; Fig. 4E, a broken-away longitudinal section of the handle part, on line et, Fig. l; and Fig. 5, a detached detail.

A is the supporting-bed of the device, and is provided with downwardly projecting lugs d a. through which are inserted fasteningscrews a d', for clamping the device to the anvilblock A, or other suitable object for holding the same in position for use. The adjustable die-plate B is seated on top of the supporting-bed, and is provided on one end with a dat die B', having a recess o2 formed in the bearing-end thereof, as shown in Figs. 2, 3, and 5. This die-plate is provided with slotted apertures a3 d3, through which is inserted the clamping-bolt a4, adj ustably securing this plate to the bed support. This feature provides for a longitudinal movement or adjustment of the die-plate in accordance with the thickness or diameter of the work, and also provides for theturning of the dieplate end for end for the purpose of bringing the roller-die2 in position for work. This cylindrical die is mounted on the opposite end of the plate B and is intended for use on flat pieces of metal, as shown at h, Fig. 3. The die-end B is for round rods, as indicated in dotted lines at b', Fig. l. The die-post C projects up through the end of the bed A and the inner end of the bending-lever D, pivoting these two parts together and leaving the bending-lever free to swing in a circle. The

lower end of the die-member C is threaded for the reception of lock nut b2. also provided with an annular shoulder b3, (Figs. l and 2,) which seats in a corresponding recess in the handle-lever D. This -feature strengthens and stiffens the die at this point. A bracket'bar E is located on the upper side of the bending-lever and is provided at each end with upturned bearing-lugs b4 and h5. The bending-lever is provided in the under side with slots d (l, (Fig. 4,) for the insertion of tap-bolts d d', which enter the under side of the bracket-bar and secure the same in a stationary position with reference to the bending-lever. The slot-s 'd permit of the bracketbar being adj usted endwise toward or away from the work in accordance with the diameter or thickness thereof. The outer end of a rod F, is loosely inserted through lug b4, on the bar E, and bears against the cam-plate G formed on the end of handle G. A pivotbolt d2 is inserted through the cam-plate and the bifurcated part of lug b4, which permits of an up and down movement of handle G. The opposite or inner end of rod F is provided with a clamping-head H, having a bearing in lug b5 of the bracket-bar E. The bearing-surface of head H, comingin contact with the work, is serrated or roughened as at cl3, Fig. l. The spring d4 coiled on rod F serves to return the rod to its normal or disengaged position when the hand pressure is relaxed on handle G. One end of a spring-brace g is secured to the under side of the handlelever, as at g; the other end being mounted on the lower end of the die-post.

In operation, the device is rst placed in the normal position illustrated in Fig. l. The work or bar of metal is then inserted between the die-members; the end projecting beyond the end of the clamping-head I-l, as indicated in dotted lines. The bending-lever is then moved around to the right and the handle G pressed down, which imparts a longitudinal movement to the rod F by means of the camplate coming in contact with the endthereof and bringing the clamping-head, on the opposite end thereof, in contact with the work. The opposite positions of the bending-lever This dielpos't is IOS) and clamping-head are indicated by dotted lines, as at h; the dotted circular line h indicating the bend forming the eye-bolt.

Having thus described my invention, what I claim as new,and desire to secure by Letters Patent, is

l. In a bending-machine, the combination with asupporting-bed, of a reversible and 1ongitudinally adjustable die-plate, having a flat die onone end and a cylindrical die on the other, substantially as set forth.

2. In a bending-machine the combination with, a bending-lever, a die-post, projecting up through one end thereof, a bracket-bar, adj ustably seated on said lever and provided with upturned lugs in the respective ends thereof, a rod, inserted and having an endwise movement in said lugs, said rod being provided on the end adjacent to the die-post with a clamping-head, and a handle, having a pivotal movement and provided on one end with a cam-plate adapted to bear against one end of said rod, whereby a downward pressure on said handle will clamp an object between the clamping-head and die-post, substantially as set forth.

3. In a bending-machine, the combination of a bending-lever,a bracket-bar, having upturned lugs, a clamping-rod, having an endwise movement in said lugs, a handle, provided with a cam-plate and bearing against one end of said rod, and a vspring coiled on said rod,whereby the rod is thrown into a clamping position when the handle is pressed down and returned to its normal position when the pressure is relaxed, substantially as set forth.

4:. In a bending-machine, the combination of a supporting-bed, a reversible die-plate, adjustably seated thereon, a bending-lever, a die-post, projecting up through the joiningends of said bed and lever, a bracket-bar, provided with upturned lugs and adjustably seated on said lever, a clamping-rod, having an endwise movement in said lugs, anda handle, provided with a cam-plate, and pivoted in one of said lugs, substantially as set forth.

MERRITT MCMASTER.

Witnesses:

WALTER NEWTON, HARRY T. HUNTER. 

